x(9x+41)=240

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Solution for x(9x+41)=240 equation:


Simplifying
x(9x + 41) = 240

Reorder the terms:
x(41 + 9x) = 240
(41 * x + 9x * x) = 240
(41x + 9x2) = 240

Solving
41x + 9x2 = 240

Solving for variable 'x'.

Reorder the terms:
-240 + 41x + 9x2 = 240 + -240

Combine like terms: 240 + -240 = 0
-240 + 41x + 9x2 = 0

Begin completing the square.  Divide all terms by
9 the coefficient of the squared term: 

Divide each side by '9'.
-26.66666667 + 4.555555556x + x2 = 0

Move the constant term to the right:

Add '26.66666667' to each side of the equation.
-26.66666667 + 4.555555556x + 26.66666667 + x2 = 0 + 26.66666667

Reorder the terms:
-26.66666667 + 26.66666667 + 4.555555556x + x2 = 0 + 26.66666667

Combine like terms: -26.66666667 + 26.66666667 = 0.00000000
0.00000000 + 4.555555556x + x2 = 0 + 26.66666667
4.555555556x + x2 = 0 + 26.66666667

Combine like terms: 0 + 26.66666667 = 26.66666667
4.555555556x + x2 = 26.66666667

The x term is 4.555555556x.  Take half its coefficient (2.277777778).
Square it (5.188271606) and add it to both sides.

Add '5.188271606' to each side of the equation.
4.555555556x + 5.188271606 + x2 = 26.66666667 + 5.188271606

Reorder the terms:
5.188271606 + 4.555555556x + x2 = 26.66666667 + 5.188271606

Combine like terms: 26.66666667 + 5.188271606 = 31.854938276
5.188271606 + 4.555555556x + x2 = 31.854938276

Factor a perfect square on the left side:
(x + 2.277777778)(x + 2.277777778) = 31.854938276

Calculate the square root of the right side: 5.64401792

Break this problem into two subproblems by setting 
(x + 2.277777778) equal to 5.64401792 and -5.64401792.

Subproblem 1

x + 2.277777778 = 5.64401792 Simplifying x + 2.277777778 = 5.64401792 Reorder the terms: 2.277777778 + x = 5.64401792 Solving 2.277777778 + x = 5.64401792 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.277777778' to each side of the equation. 2.277777778 + -2.277777778 + x = 5.64401792 + -2.277777778 Combine like terms: 2.277777778 + -2.277777778 = 0.000000000 0.000000000 + x = 5.64401792 + -2.277777778 x = 5.64401792 + -2.277777778 Combine like terms: 5.64401792 + -2.277777778 = 3.366240142 x = 3.366240142 Simplifying x = 3.366240142

Subproblem 2

x + 2.277777778 = -5.64401792 Simplifying x + 2.277777778 = -5.64401792 Reorder the terms: 2.277777778 + x = -5.64401792 Solving 2.277777778 + x = -5.64401792 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.277777778' to each side of the equation. 2.277777778 + -2.277777778 + x = -5.64401792 + -2.277777778 Combine like terms: 2.277777778 + -2.277777778 = 0.000000000 0.000000000 + x = -5.64401792 + -2.277777778 x = -5.64401792 + -2.277777778 Combine like terms: -5.64401792 + -2.277777778 = -7.921795698 x = -7.921795698 Simplifying x = -7.921795698

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.366240142, -7.921795698}

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